What is the law of conservation of mass?
Counting Atoms & Conservation of Mass

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•
Science
•
8th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.
2.
FLASHCARD QUESTION
Front
If you add 0.25 grams of baking soda to 5 grams of water, what will be the mass of the final solution?
Back
5.25 grams.
3.
FLASHCARD QUESTION
Front
What does a subscript in a chemical formula indicate?
Back
A subscript indicates the number of atoms of the element in the molecule.
4.
FLASHCARD QUESTION
Front
How many atoms of an element are present if there is no subscript in its chemical formula?
Back
Only 1 atom.
5.
FLASHCARD QUESTION
Front
What is a balanced chemical equation?
Back
A balanced chemical equation has the same number of each type of atom on both sides of the equation.
6.
FLASHCARD QUESTION
Front
Is the equation H2 + O2 --> H2O balanced or unbalanced?
Back
Unbalanced.
7.
FLASHCARD QUESTION
Front
What is the significance of balancing chemical equations?
Back
Balancing chemical equations ensures that the law of conservation of mass is upheld, showing that matter is conserved in a reaction.
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